Abrasive wheel guard



Feb., 22, 1949. L. J. H. BALLINGER ABRASIVE WHEEL GUARD Filed July 17, 1946 navi. NT on: Lawns a. H. \s UNGE R BY V ATT e RNE.

Patented Feb. 22, 1949 BBASIVE WEEEL GUARD Lewis .lohn Howell Ballinger, Randwick, near Stroud, England Application July 17, 1946, Serial No. 684,141 In Great Britain May 30, 1946 2 Claims.

This invention relates to a guard for a high speed abrasive Wheel.

In accordance with the present invention I provide a guard for a high speed abrasive wheel having passages through which cooling fluid passes to the opposite faces of the abrasive wheel, the passages being open on the sides adjacent the wheel and contracting in cross-section in the direction of rotation of the wheel.

The accompanying drawings illustrate one form of guard made in accordance with the present invention, wherein:

Fig. 1 is a sectional elevation,

Fig. 2 is a section on line II-1I, Fig. 1,

Fig. 3 is a plan, and

Fig. 4 is a developed detail.

As illustrated the guard is formed in two halves, a, b, one half a being clamped at al to the spindle housing c, the second half b being detachably attached at bl to the first half a for Wheel removal.

Each half is formed with water passages d, e, connecting a Water inlet f to circular portways g, h, formed on the inside guard faces against the side faces of the abrasive wheel i and reasonably near the outside diameter of the abrasive Wheel support anges 7'.

The circular portways y, h, connecting with wedge-shaped. radial grooves lc also formed on the inner faces of the abrasive Wheel guard halves a, b the shape of the wedge having a special relation to the direction of rotation of the abrasive wheel, that is to say, pointing in the direction of that rotation.

The wedge-shaped grooves 7c need not be radial.

In operation water Z flows via the water inlet f and passageways CZ, e to the circular port- Ways g, h. When assisted by centrifugal force created by the speed of rotation of the abrasive wheel, the water Z ows through the Wedgeshaped radial grooves lc outwards towards the outer periphery of the abrasive wheel z'. The water also tends to follow the direction of rotation of the abrasive wheel i. Due to the relation of the Wedge-shaped radial grooves k to `the direction of rotation of the abrasive wheel i, Water is impinged on each side of the rotating abrasive wheel z'; the resultant of the action on the water is, therefore, at a tangent to the wheel. The Water flows through and is deflected by the Wedge shaped grooves lc to produce axial pressure against both side faces of the abrasive wheel. Furthermore the stationary guard side faces form stationary reaction members on which the liquid pressure is built up between the guard and the Wheel side faces, thereby pressure cooling the abrasive wheel and the liquid supporting the abrasive Wheel.

What I claim and desire to secure by Letters Patent is:

1. A guard for a high speed abrasive Wheel formed in complementary sections, one section being clamped to the housing of the Wheel spindle, another and complementary section being detachably attached to the iirst mentioned section, each section being formed with fluid passages connecting a liuid inlet to portways formed on the inside guard faces against the side faces of the abrasive wheel and reasonably near the outside diameter of flanges on the abrasive wheel support, the portvvays connecting with radial passages wedge shaped in cross section and open to the wheel on the sides adjacent the wheel and which contract in the direction of rotation of the wheel also formed on the inner faces of the abrasive wheel guard section, the apex of the contraction pointing in the direction of rotation of the abrasive wheel.

2. A guard for a high speed abrasive Wheel formed in. two halves, one half being clamped to the housing of the Wheel spindle, the second half being detachably attached to the rst half, each half being iormed with Water passages connecting a water inlet to circular portways formed 0n the inside guard faces adjacent the side faces of the abrasive Wheel and reasonably near the outside diameter of flanges on the abrasive wheel support, the circular portways connecting with wedge-shaped radial passages also formed on the inner faces of the abrasive wheel guard halves open to the wheel on the sides adjacent the wheel, the apex of each Wedge pointing in the direction of rotation of the abrasive wheel.

LEWIS JOI-IN HOWELL BALLINGER.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Number Name Date 366,897 Stiles July 19, 1887 375,821 Hyde et al. Jan. 3, 1888 796,466 Stolzenberg Aug. 8, 1905 995,524 Hanson Dec. 1, 1908 1,482,855 Morgan Feb. 5, 1924 1,680,360 Bath Aug. 14, 1928 2,343,556 Jacobsen Mar. 7, 1944 2,378,070 Eastwood June 12, 1945 FOREIGN PATENTS Number Country Date 210,580 Great Britain Feb. 7, 1924 

